51. I happened ______ that news from a magazine.
A. known B. to be known C. to know D. know
52. Do you understand _______?
A. what done B. what doing C. what to do D. what do
53. Can somebody show me ______ the film in this cinema?
A. how to changed B. how change C. how changing D. how to change
54. Don’t forget _____ the letter I gave you.
A. to post B. posting C. post D. posted
55. There was a lot of traffic, but we managed _____ to the airport in time.
A. are gone B. going C. to go D. to be going
56. Jill didn’t afford _____ a car.
A. buy B. to buy C. buying D. bought
57. They had a boy ______ that yesterday.
A. done B. to do C. did D. do
58. We get our mail ______ yesterday.
A. been delivered B. delivered C. delivering D. to deliver
59. We’ve got a new computer in our office. I haven’t learnt how ______ it yet.
A. to operate B. operating C. operate D. be operated
60. We were all too afraid to speak. Nobody dared ______ anything.
A. saying B. being said C. says D. to say